He still said Wilt is a top 15 player, so it's not like he's saying he was average.

I think he just means that Wilt's main advantage was the era he played in, and while he had a lot of talent and skill, he was just so much bigger than everyone that he was able to put up ridiculous numbers, numbers that he wouldn't come close to reaching if he played today

He said an average center would do the same thing? Is Wilt an average Center? Obvious answer is no.